(4) NASA.
http://commons.wikimedia.org/wiki/File:Earlobes_free_attached.jpg. Public
Domain.(5) http://en.wikipedia.org/wiki/Image:Tree_of_life_by_Haeckel.jpg. Public
Domain.(6) http://en.wikipedia.org/wiki/File:Evolution_pl.png. CC-BY-SA.(7) http://en.wikipedia.org/wiki/Image:Voyage_of_the_Beagle.jpg. GNU-FDL.(8) http://en.wikipedia.org/wiki/File:IMG013biglittledogFX_wb.jpg. GNU-FDL.(9) http://en.wikipedia.org/wiki/Image:Isotope_ratio_ms.jpg. Public Domain.(10) USGS.http://en.wikipedia.org/wiki/Image:Geologica_time_USGS.png. Public
Domain.
(11) http://www.fas.org/irp/imint/docs/rst/Sect20/A12.html.
(12) http://texasturtle.files.wordpress.com/2008/08/lonesome-george.jpg.
(13) http://en.wikipedia.org/wiki/Image:Genome_viewer_screenshot_small.png.
Public Domain.
(14) http://en.wikipedia.org/wiki/Image:Insects_in_baltic_amber.jpg.
GNU-FDL.
(15) http://commons.wikimedia.org/wiki/File:11-Honkers-web.jpg. Creative
Commons.
(16) Kieff.http://commons.wikimedia.org/wiki/Image:Pangaea_continents.png.
GNU-FDL.
(17) http://en.wikipedia.org/wiki/File:Ginkgo_biloba_MacAbee_BC.jpg.
GNU-FDL.
(18) http://en.wikipedia.org/wiki/Image:Charles_Darwin_by_G._Richmond.jpg.
Public Domain.
(19) http://en.wikipedia.org/wiki/File:
Stavenn_Sciurus_aberti_kaibabensis_00.jpg. GNU-FDL.
(20) User: The Prophet Tiresias.
http://en.wikipedia.org/wiki/Image:Selection_Chart.png. Public Domain.
(21) http://en.wikipedia.org/wiki/Image:Tarbosaurus_museum_Muenster.jpg.
GNU-FDL.
